I was trying to get the official php:5.6-apache docker container compiled with GD for a project. GD would install but the JPEG support was missing. I managed to figure out the missing libraries and config in the end.
This is what my docker file looks like now, with the important bits in bold:
FROM php:5.6-apache RUN apt-get update \ && apt-get install libpng12-dev libfreetype6-dev libjpeg62-turbo-dev -qy \ && apt-get clean \ && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \ && docker-php-ext-install gd